Exercise device



FIG. 1 is a front view showing my new design for an exercise device, the rear view being a mirror image thereof,

FIG. 2 is a left side view, the right side view being a mirror image thereof;

FIG. 3 is a perspective view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof. 

The ornamental design for an exercise device, as shown and described. 